<!-- Context surface -->
  
<context id="surface" calendar_type="Julian" start_date="2012-03-01 15:00:00" time_origin="2012-02-29 15:00:00">

  <field_definition level="1" enabled=".TRUE." domain_ref="domain_srf"  axis_ref="axis_srf" operation="average" freq_op="1ts" default_value="9.96921e+36" prec="4">
    <field id="field_A_srf"  name="field_A_srf" long_name="Champ en degC" operation="average" unit="degC" />
    <field id="field_A_srf_K" name="field_A_srf_K" field_ref="field_A_srf" long_name="Champ en degK" unit="degK"> field_A_srf + 273.15 </field>
    <field id="field_A_srf_max" name="field_A_srf_max" field_ref="field_A_srf" long_name="maximum field_A_srf" operation="maximum" />
    <field id="field_D_srf" name="field_D_srf" long_name="Somme champ A et C" > field_A_srf + field_C_srf </field>
    
  </field_definition>
    
  <file_definition type="multiple_file" par_access="collective" output_level="10" enabled=".TRUE.">
    <file id="output_surface" name="output_surface_6h" output_freq="6h" > 
      <field field_ref="field_A_srf" >
	<variable id="my_attribute1" type="string" >surf_att</variable>
	<variable id="my_attribute2" type="integer" > 10 </variable>
	<variable id="my_attribute3" type="float" >6.8</variable>
	<variable id="my_attribute4" type="double" >100.201</variable>
      </field>
      <field field_ref="field_A_srf_K" />
      <field field_ref="field_A_srf" name="field_A_srf_min" operation="minimum" />
      <field field_ref="field_A_srf" name="field_A_srf_max" operation="maximum" />
      <field field_ref="field_A_srf" name="field_A_srf_prec4" prec="8"/>
      <field field_ref="field_A_srf_max" name="field_A_srf_mean_max" long_name="Average of hourly maximum over 6h" operation="average" freq_op="1h" > @field_A_srf_max </field>
      <variable id="my_global_attribute" type="string" >file_6h</variable>
    </file>

    <file type="one_file" id="output_surface_1d" name="output_surface_1d" output_freq="1d" > 
      <field field_ref="field_A_srf" >
	<variable id="my_attribute1" type="string" >surf_att</variable>
	<variable id="my_attribute2" type="integer" >10</variable>
	<variable id="my_attribute3" type="float" >6.8</variable>
	<variable id="my_attribute4" type="double" >100.201</variable>
      </field>
      <field field_ref="field_A_srf_K" />
      <field field_ref="field_A_srf" name="field_A_srf_min" operation="minimum" />
      <field field_ref="field_A_srf" name="field_A_srf_max" operation="maximum" />
      <field field_ref="field_A_srf" name="field_A_srf_prec4" prec="8"/>
      <field field_ref="field_A_srf_max" name="field_A_srf_mean_max" long_name="Average of hourly maximum over 1d" operation="average" freq_op="1h" > @field_A_srf_max </field>
      <variable id="my_global_attribute" type="string" >file_1d</variable>
    </file>
  </file_definition>
 
   <axis_definition>
     <axis id="axis_srf"/>
   </axis_definition>
    
   <domain_definition>
     <domain id="domain_srf" />
   </domain_definition>    
  
   <grid_definition />    
  
</context>
